UNIVERSITY OF CALIFORNIA OBSERVATORIES / LICK OBSERVATORY

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PLOT MOUNT HAMILTON WEATHER DATA
Outside temperature, relative humidity, and barometric pressure may be plotted as far back as the beginning of the previous calendar year.

Data are collected at five-minute intervals and downloaded once/hour. Until 8pm, March 12, 2003, data were those recorded by weather sensors located on the "old Harlan house," about two hundred feet northwest of the Shane 3-meter dome. Since then, weather sensors on top of the 3-meter, providing readings more representative of conditions at that telescope, have been used.

Please choose the type of data and the number of days over which you wish them plotted. Program will only retrieve data back to the beginning of the previous calendar year, even if a larger number of days is entered.

N.B.: Long periods can be slow to process.
N.B.: Sea level pressure is ~29.9", corrected pressure for Mt. H. is ~25.6".

Number of days to plot

Outside temperature (F)
Wind speed (MPH) Sorry, no wind speed since about October 05
Relative humidity
Barometric pressure


Constrain temperature scale (F) Min Max
Constrain windspeed scale (MPH) Min Max
Constrain humidity scale (%RH) Min Max